Honeywell TB6980 Installation And User Manual

1. Introduction
The TB6980/TB7980 digital thermostats provide proportional plus
integral individual space temperature control in zoned commercial
HVAC systems such as hydronic and pressure dependent VAV with
or without reheat. There are four different models:
• TB7980A (single output, modulating)
• TB7980B (multiple output modulating)
Depending on the models, the thermostat can have up to three out-
puts for the following applications:
 Floating or Modulating damper/valve actuator control
 Damper/valve actuator control with duct reheat and auxiliary
heat (B models only)
 Hydronic systems (room control, perimeter heating and cool-
ing)
Accessories
 R841 family of electromechanical relays
 T7770A3002 remote room sensor
 50014156-002 remote room sensor
 32004800-001 bare thermistor
 50014157-001 duct temperature sensor
2. Installation
2.1 Mounting Instructions
1. Remove the thermostat from its base by unscrewing the cap-
tive screw and tilting the bottom of the thermostat up. The
screw cannot be completely removed.
2. Pass the wires through the center hole of the base and secure
the base to the wall or onto an electrical box.
3. Wire the thermostat. See section 2.2 for terminal designations
and section 3 for typical wiring diagrams.
4. Reinstall the thermostat onto its base and secure with the cap-
tive screw.
TB6980/TB7980
• TB6980A (single output, floating)
• TB6980B (multiple output, floating)
TB6980/TB7980
Installation and User Guide
Configuration and status display
Cooling mode
Temperature
adjustment
button
Override button
2.2 Terminal Designations
The designations of the terminals vary according to the particular
model of thermostat. Refer to the following table for the description
of each terminal.
TERMINAL DESCRIPTION
1 24 VAC
Power supply
2 COM
3 AN1
4 COM
Output 1
3 OPEN
4 CLOSED
5 T2/AN2
Output 2 (TB6980B and TB7980B models)
6 T2/COM
7 T3
Output 3 (TB6980B and TB7980B models)
8 T3
9 COM External sensor input. (For applications requiring
10 SENSOR an external sensor, see section 4.2.)
9 COM Mode Changeover input (N.O. contact). See sec-
11 C-Over tion 5.5.2.
9 COM Night Setback activation input (N.O. contact).
12 NSB See section 5.6.
Note: To configure the terminals, see section 4.
ZonePRO Thermostats
Heating mode
Temperature display
Output power display
TB7980 models
TB6980 models
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